Burglar-alarm.



A. VERHOEVEN. BURGLAR ALARM.

APPLICATION FILEI) MAY 1909.

932,858. Patent-ea Aug. 24, 1909.

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W /IW I W Wi. kumam A. VERHOBVEN.

BURGLAR ALARM.

v APPLIO'ATION PILED MAY 1909.

Patented Aug. 24. 1909.

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trouw ARNOLD VEBHOEVEN, OF MARIANNA, ARKANSAS.

BRGLAR-ALARM.

specification of Letters Patent.

Application filed May 6, 1909.

Serial No. 494,214.

To all 107mm it may concer'n:

Be it known that 1, ARNOLD VERHOEVEN, a citizen of the United States, residing` at Marianna, in the county of Lee and State of Arkansas, have invented certain new and useful Improvements in Burglar -Alarms; and 1 do hereby declare the following' to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being` hadv to the accompanying` drawings, and to the letters of reference marked thereon, wlllCli f01`111 il part of this specification.

This invention relates to new and useful improvements in hurglar alarm apparatus and comprises means connected with an ordinary door lock so arrang'ed that, in the event of a erson turningl the knoh while the door is loc (ed, a signal will he sounded.

The invention comprises various details of construction, comhinations and arrangements of parts which will he hereinafter fully described and then specifically defined in the appended claiins.

illustrate my invention in the acc-ompanying` drawings, in which Figure 1 is a diagrammatic view showing` an electric hell and battery in circuit with a lock. Fig'. 2 is an enlarged detail view in elevation of the works of the lock showing` the 'terminals and the means for closing` the circuit. Fig. 3 is a detail of the rear side of the knob-actuated latch showing the projections thereon and a contact wire interinediate the same, and Fig. 4 is a detail view showing` the lock connected to the wires of a teleplione.

Reference now being had to the details of the drawings by letter, A designates an electric hell, B a battery and C a Wire connecting the battery with the bell and which may be located at any suitable place.

D designates the casing of a lock of the usual construction, and E and F' designate two terminals mounted upon said casing and G is a wire connecting` one of said terminale with the hell and the other wire G' connects the terminal E' with the battery. A push button, designated hy letter H, is mounted upon the door I and has a wire J connecting one terminal thereof with. the terminal E' while another wire 1' connects the other terminal of the push button with the terminal E. hfounted within said lock casing is the usual lock holt K and fastened to said holt is strip L of non-electric conductive material and fastened to said strip L is one end of the wire M which is turned into a coil M' and pivotally mounted upon an insulated pin N carried by the wall of the casing. A wire O is connected to said coil and extends to and is connected to the terminal E' and one end P of the wirc M is free and is adapted, as the coil M' turns upon its pivot, to he moved into such position that, when the knob-actuated latch Q, is moved in one direction or another, said end P will contact with one projection or another Q' upon the latch Q for the purpose of closing` a circuit and causing` an alarm to he sounded. The teri iinal E is normally in contact with the latch Q, therehy completing the circuit when the free end P is in contact with said latch as the knob is turned in one direction or the other.

In 4 of the drawing's, 1 have shown the alarm apparatus applied to a telephone wherehy, in the event of any one turning` the knoh while the door is locked, a signal may he announced at the telephone office and in said modification the two wires S and T are connected, the former with the terminal R and the latter with the batteries R' which in turn are connected through the wire lt2 with the terminal R3.

In operation, when the holt of the lock is turned by means of a key, the wire M, which is connected to the insulated strip fastened to said holt, will cause said wire to tilt so that the free end P will be thrown between the projections Q' upon the latch Q so that, in the event of the knoh being' turned in one direction or the other for the purpose of moving` said latch longitudinally, one projection or another Q' will contact with the end P and close the circuit and cause an alarm to he sounded either at the hell A or at the telephone headquarters through the connections with the telephone descrihed. TWhen the holt of the lock is thrown hack in an unlocked position, the wire M will tilt upon its pivot and the free end P will be thrown from between the projections Q', thus allowing the knob-actuated latch to be moved freely without sounding' the alarm.

By the rovision of the push button, the alarm bellpmay be ut-ilized in the regular way when the door is unlocked.

lVliat 1 claim to bc new is 1. A hurglar alarm comprising` a. lock casing, a holt mounted therein, a conductor Patented Aug. 24:, 1909.

wire mounted within the casing and having a resilient arm connected with suitable insulation to said bolt, a terminal to which said conduotor is connected, an integral finger projecting from said,conductor, a knob-actuated latch mounted within the easing', a terminal electrically connected to said latch, a bell and battery with connections between the same and said terminals, said finger being adapted to be moved by the bolt when thrown into a locked position, into the path of the latch.

2. A burglar alarm comprising a lock casing, a bolt mounted therein, a conductor Wire mounted Within the casing and having` a resilient arm connected with suitable insulation to said bolt7 a terminal to which said conduotor is connected, an integral finger project-mg from said conduotor, a knob-actuated latch mounted within the easing'7 projections spaced apart upon said latch, a terminal electrically connected with the latch, a bell and battery with connections vbetween the same and said terminal, said finger being adapted to be positioned between said projections when the bolt is in a locked position thus causing the circuit to be closed las one or the other of said projections contacts with said 'finger as the latch is moved in one direction or the other.

A. burglar alarm comprising a lock casing, a bolt mounted therein, a conduotor Wire bent to form a coil, an insulating pin carried by the casing and passing` through said coil, one end of said wire being connected to said bolt and insulated therefrom, a terminal to which the other end of the conduotor is fastened, a 'finger projecting from said I wire, a knob-actuated latch7 a terminal con- `nected therewith, a battery and electrical wire bent toform a coil, an insulating` pin carried by the casing and passing through said coil, an insulation strip fastened to the inner end of said bolt and to which strip one end of said conduotor is fastened, a terminal to which the other end of the conduotor Wire is connected, a longitudinally movable knobactuated latch mounted within the casing and provided with laterally projecting pins spaced apart7 a terminal in contact with said latch, a battery and connections between the same and said terminals, a i'inger projecting` from said conduotor and adapted to be moved between said pins upon the latch when the bolt is thrown to a loclred position thus causing the Circuit to be closed as one or the other of said projections contacts with said finger as the latch is moved in one direction or the other.

In testimony whereof hereunto aflix my signature in the presence of two witnesses ARNOLD VERHOE'YEN.

TWitnesses VV. P. HARRIS, T. B. SMITH.

ing, a bolt mounted therein, a conduotor 

